VAMP 259 - Environmental Conditions; Casing; Package; Protection Stages

9.3 Protection stages
9 Technical data
Technical description
282
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VM259.EN007
9.2.4. Environmental conditions
Operating temperature
-10 to +55 C
Transport and storage temperature
-40 to +70 C
Relative humidity
< 75% (1 year, average value)
< 90% (30 days per year, no condensation
permitted)
9.2.5. Casing
Degree of protection (IEC 60529)
IP20
Dimensions (W x H x D)
208 x 155 x 225 mm
Material
1 mm steel plate
Weight
4.2 kg
Colour code
RAL 7032 (Casing) / RAL 7035 (Back plate)
9.2.6. Package
Dimensions (W x H x D)
215 x 160 x 275 mm
Weight (Terminal, Package and Manual)
5.2 kg
9.3. Protection stages
9.3.1. Non-directional current protection
Overcurrent stage I> (50/51)
Pick-up current
0.10 – 5.00 x In
Definite time function:
DT
- Operating time
0.08
**)
– 300.00 s (step 0.02 s)
IDMT function:
- Delay curve family
(DT), IEC, IEEE, RI Prg
- Curve type
EI, VI, NI, LTI, MI…depends on the family *)
- Time multiplier k
0.05  20.0, except
0.50  20.0 for RXIDG, IEEE and IEEE2
Start time
Typically 60 ms
Reset time
<95 ms
Retardation time
<50 ms
Reset ratio
0.97
Transient over-reach, any 
<10 %
Inaccuracy:
- Starting
±3% of the set value or 5 mA secondary
- Operating time at definite time function
±1% or ±30 ms
- Operating time at IDMT function
±5% or at least ±30 ms **)
*) EI = Extremely Inverse, NI = Normal Inverse, VI = Very Inverse, LTI = Long Time Inverse
MI= Moderately Inverse
**) This is the instantaneous time i.e. the minimum total operational time including the fault
detection time and operation time of the trip contacts.